Are there any precautions that should be observed when measuring an inductor or transformer?
When measuring the resistance of an inductor or transformer after conducting an insulation withstanding test, you could damage the resistance meter if the output voltage from the insulation withstanding tester is inadvertently applied to it. Exercise caution concerning the following when using a custom-designed switching system to perform measurement. Ensure that the switching device (relay, switch, etc.) does not cause the high voltage from the insulation withstanding tester to be applied to the resistance meter. Additionally, allow sufficient time for the measurement target to discharge after the test before performing resistance measurement as it will have become charged.